Airport month record

LASJAN

Harry Reid International in January 2026

Departures: 13,695
Month: January 2026
National, same month: 79.2%
Carriers: 10

Historical statistics for January 2026, not live status or a forecast for this year’s January. For today’s conditions at LAS, see live FAA status.

LAS in January lands a B, 4 points better than the national rate of 79.2%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 13,695 flights, of which Spirit Airlines flew 494 at 88.1% on time.

Spirit Airlines is the most reliable of the eight carriers covered here at 88.1% on time across 494 flights.

On time

83.1%

Arrivals under 15 minutes late, of 13,423 completed departures

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

1.86%

Nationally in January: 4.71%

Whole year

77.9%

LAS across all twelve months

These figures cover 13,695 departures from Harry Reid International in January 2026. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

January next to LAS's other months

Against LAS's own year, January ran 5 points better than the twelve-month rate of 77.9%, which makes it the best of the twelve months in the data. Cancellations are where January stands out: 1.86% of scheduled departures were called off, 2.1 times the airport's rate across the year. Either side of it, December ran 79.9% on time and February 83.1%, so this month sits in line with its neighbours.

LAS month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	15,733	72.9%	67 min	1.13%	C
August 2025	14,920	79.6%	59 min	0.50%	B+
September 2025	14,399	78.8%	66 min	0.53%	B+
October 2025	15,597	77.1%	62 min	0.31%	B+
November 2025	14,443	79.5%	59 min	1.73%	B
December 2025	14,547	79.9%	59 min	0.60%	B+
January 2026 (this page)	13,695	83.1%	65 min	1.86%	B
February 2026	12,886	83.1%	58 min	0.88%	B+
March 2026	15,169	78.3%	60 min	1.15%	B
April 2026	14,672	78.8%	54 min	0.40%	B+
May 2026	14,585	74.1%	60 min	0.67%	C+
June 2026	13,704	70.7%	61 min	0.77%	C+

Departure window

The best time of day to leave LAS in January

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 13 points, against 10 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,966 flights91.8%
8am–11am2,968 flights85.9%
11am–2pm2,705 flights81.6%
2pm–5pm2,395 flights78.4%
5pm–8pm2,104 flights79.3%
8pm–5am1,557 flights81.6%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 91.8% of the time, against 78.4% for the afternoon window. That is 13 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 2,968 flights scheduled in it.

Across the week, Wednesday is the strongest day at 91.0% on time and Thursday the weakest at 77.6%. 13 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at LAS in January

The choice of carrier is not cosmetic here. Spirit Airlines arrives on time 88.1% of the time; American Airlines manages 78.2%. Sample sizes sit next to every figure, because a two-point gap across 1,063 flights means less than a ten-point one.

Carriers at LAS in January 2026
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	6,704	82.5%	47 min	1.13%	B
Delta Air Lines	1,366	85.5%	86 min	1.76%	A
United Airlines	1,295	86.3%	71 min	1.08%	A
American Airlines	1,063	78.2%	121 min	7.53%	B−
Frontier Airlines	932	80.4%	68 min	1.82%	B
Alaska Airlines	674	83.6%	56 min	1.34%	B
Allegiant Air	534	86.1%	91 min	1.50%	A
Spirit Airlines	494	88.1%	80 min	2.43%	A
JetBlue Airwaysthin sample	352	81.7%	98 min	3.69%	B−
SkyWest Airlinesthin sample	281	81.5%	57 min	0.71%	B+

American Airlines cancels 7.5% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

Route by route

Busiest routes out of LAS in January

Routes from LAS in January 2026
Route	Flights	On time	Avg delay	Cancelled	Grade
LAS to LAX · Los Angeles	740	79.7%	59 min	0.81%	B+
LAS to DEN · Denver	561	85.7%	60 min	0.36%	A+
LAS to SFO · San Francisco	521	78.5%	79 min	0.77%	B+
LAS to PHX · Phoenix	512	81.8%	63 min	1.17%	B
LAS to SEA · Seattle	459	86.9%	49 min	0.44%	A+
LAS to DFW · Dallas-Fort Worth	424	77.1%	116 min	9.20%	B−
LAS to SAN · San Diego	406	71.9%	56 min	0.99%	C+
LAS to ATL · Atlanta	384	86.3%	69 min	2.86%	A
LAS to SNA · Santa Anathin sample	358	89.1%	53 min	0.28%	A+
LAS to ORD · Chicagothin sample	356	78.7%	88 min	0.56%	B+
LAS to BUR · Burbankthin sample	340	83.7%	48 min	0.29%	B+
LAS to RNO · Renothin sample	321	87.1%	64 min	0.62%	A+
LAS to SLC · Salt Lake Citythin sample	318	86.1%	58 min	0.63%	A+
LAS to SJC · San Josethin sample	303	86.1%	65 min	0.00%	A+
LAS to SMF · Sacramentothin sample	294	81.6%	53 min	0.34%	B+
LAS to JFK · New Yorkthin sample	293	83.2%	93 min	4.78%	B−
LAS to IAH · Houstonthin sample	282	90.3%	74 min	1.06%	A
LAS to DTW · Detroitthin sample	251	82.5%	78 min	0.00%	B+
LAS to EWR · Newarkthin sample	249	87.3%	92 min	4.82%	A−
LAS to OAK · Oaklandthin sample	236	82.2%	52 min	0.00%	B+
LAS to PDX · Portlandthin sample	225	84.3%	51 min	0.89%	B+
LAS to DAL · Dallasthin sample	224	79.8%	39 min	4.91%	B−
LAS to AUS · Austinthin sample	214	78.9%	71 min	2.34%	B
LAS to ONT · Ontariothin sample	212	82.8%	52 min	0.94%	B+
LAS to LGB · Long Beachthin sample	189	84.1%	38 min	0.00%	B+

Delay causes

What held LAS up in January

One category carries most of the weight here. Late-arriving aircraft accounts for 44% of the 148,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
44%
Carrier
37%
National Airspace System
15%
Extreme weather
4%
Security
0%

44% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 148,000 reported delay minutes here, that single category outweighs weather by 12 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 147,774 reported delay minutes.

Cancellations sit at 1.86% against a national 4.71%, which is ordinary. Diversions add another 0.12%.

5.2% of arrivals land an hour or more late, close to the national 7.6%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

What to do with this

Flying from LAS in January

For a January trip through LAS: this is one of the better months to be flying from here, 83.1% on time with 1.86% cancelled. That is a base rate for the month as a whole; a single storm can still spoil a particular day.

Harry Reid International (LAS), the whole year
LAS in July72.9%
LAS in August79.6%
LAS in September78.8%
LAS in October77.1%
LAS in November79.5%
LAS in December79.9%
LAS in February83.1%
LAS in March78.3%
LAS in April78.8%
LAS in May74.1%
LAS in June70.7%

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures